Right click on this link DWG_Columns.vbs.txt and save it as DWG_Columns.vbs without the .txt extension in the folder %appdata%\GPSoftware\Directory Opus\Script AddIns. The file can also be dragged and dropped into the Scripts dialog box that is access from Settings>Preferences>Toolbars>Scripts.

After that the columns can be showed by right click on the column headers via Columns>Script>DWG Columns

And as can be seen below DWG version and DWG title has been showed. Other drawing file properties or metadata from the Summary and Details tab can be showed too.